Monitor flickers when turning on/off power switches in another room

[chengsun]

Recently my Dell 23" monitor got this issue. It is in my study room. When desktop is off, I normally leave the power of monitor on, it goes into sleep. When I switch on power switch of ceiling light in study room, the monitor will sudden "comes back to life". I know coz the led monitor turns into blue from amber.

And, when desktop is on monitor in use, is someone turn a power switch of ceiling light in another room, or living hall, the monitor will flicker, blank for 1, 2 seconds, then back to normal.

I tried changing the power source of this monitor, but doesn't solve the problem.

Could it be power cord problem? Or monitor itself?

 

[squeeish]

Something wrong with your wall socket. What you're experiencing is something along the lines of electromagnetic interference.

 

[chengsun]

Something wrong with your wall socket. What you're experiencing is something along the lines of electromagnetic interference.

serious? any way to fix it? this monitor is rather new, bought in 2011 year end or early 2012, and my house reno was done 2011 march, i even had whole house rewire......

 

[squeeish]

It's not the monitor's fault. You could probably try changing the power strip that you use, or another wall socket in the same room to see if the problem persists. Google around, there are people with problems similar to yours.

 

[aerosmiths]

wtf, i thought it was normal. i experience similar things like these for years already, always thought it was normal.

e.g. whenever the lights in the living room was switch on or off, my keyboard and usb mouse in my room looses power for 1 sec. sometimes this can cost a dota game lol.

 

[squeeish]

And you never fixed it? I'll go crazy if this happened to me. Anyway this can't be good for your computer in general.

 

[chengsun]

It's not the monitor's fault. You could probably try changing the power strip that you use, or another wall socket in the same room to see if the problem persists. Google around, there are people with problems similar to yours.

initially i connected monitor to a power extension, drawing power from wall socket. then I changed it to directly to a 3-ways plug on wall socket, issue remains.

 

[Phelan]

It's the fault of your house electrical wiring. The sockets aren't isolated properly from each other.

 

[chengsun]

It's the fault of your house electrical wiring. The sockets aren't isolated properly from each other.

any work around?

 

[Phelan]

any work around?

Nope. You have to redo your house wiring.

 

[SiaoAngMoh]

I would suspect the issue is with the grounding of the video cable, rather than the power cable.

Try removing all the video sources and try again.

If the issue remains with all the cables except the power cord disconnected, then the work around is to add a ferrite or two onto the power cord at the monitor end.

 

[chengsun]

something is very wrong. now, my monitor flicker when i open Chrome. Can refer to this video:

It happens, when Chrome is in full window, but if I minimize it a little, it is OK.

What the hell is happening?

 

[squeeish]

Are you the only one with a computer in the house? You have to try to see if the problem is isolated to your monitor only, or if someone else's monitor exhibits the same behavior.

 

[blue00]

serious? any way to fix it? this monitor is rather new, bought in 2011 year end or early 2012, and my house reno was done 2011 march, i even had whole house rewire......

later 2011? or early 2012?

u know what year we r in?

 

[megalord]

It's the fault of your house electrical wiring. The sockets aren't isolated properly from each other.

Would you be able to share how are sockets isolated? I understand they share the same incoming, the only separation at circuit breaker side. However, to my understanding, circuit breakers are not designed to operate in isolation when turned on.

Could it be that particular monitor has poor EMC instead?

 

[flee0308]

Would you be able to share how are sockets isolated? I understand they share the same incoming, the only separation at circuit breaker side. However, to my understanding, circuit breakers are not designed to operate in isolation when turned on.

Could it be that particular monitor has poor EMC instead?

What you're experiencing is voltage sag /swell. Consider getting a capacitor.

 

[localITguy]

i know this is a 2014 thread, sorry for the bump just wanted to comment

i am also having this issue with my new benq monitor and i didn't encounter this issue when using DVI Cable.

bad cable maybe?


Possible solution.

Thanks

 

[yusoffb01]

i know this is a 2014 thread, sorry for the bump just wanted to comment

i am also having this issue with my new benq monitor and i didn't encounter this issue when using DVI Cable.

bad cable maybe?


Possible solution.

Thanks

Replace your whole house wiring

 

[MrMundy]

shag, i also have the same problem i suspected it was the house wiring old liao (15+ years already)

 

[commach]

Add a capacitor to all the fluorescent lights, the electrician cut corners and did not connect a capacitor to the light to prevent such problem.

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